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170 v. 175

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=137664
Printed Date: 08 Nov 2025 at 7:45pm
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Topic: 170 v. 175
Posted By: SD Allis
Subject: 170 v. 175
Date Posted: 22 Apr 2017 at 8:33pm
Does someone know / What are the major differences between a 170 and a 175



Replies:
Posted By: Mrgoodwrench
Date Posted: 22 Apr 2017 at 9:17pm
175 is five more than 170.




As I understand it rated rpm is the biggest difference

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Posted By: Eldon (WA)
Date Posted: 22 Apr 2017 at 10:10pm
I have both in diesel models and really can't tell the difference.

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This year:


Posted By: DSeries4
Date Posted: 22 Apr 2017 at 10:43pm
No major differences.  170 diesel uses the Perkins 236 and so did first year 175s.  All other 175s had the 248 Perkins.



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'49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '63 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '84 8030, '85 6080


Posted By: B26240
Date Posted: 23 Apr 2017 at 6:07am
One interesting trivia fact about the 175 gas is it was the last gas tractor AC built.


Posted By: DrAllis
Date Posted: 23 Apr 2017 at 9:24am
54 HP versus 60 HP.   All 175's had 185 final drives, which were geared a little slower. All 175's had a 15% faster second gear in the transmission.   175's had a hydraulic oil cooler (I think).


Posted By: DSeries4
Date Posted: 23 Apr 2017 at 9:27am
Originally posted by DrAllis DrAllis wrote:

54 HP versus 60 HP.   All 175's had 185 final drives, which were geared a little slower. All 175's had a 15% faster second gear in the transmission.   175's had a hydraulic oil cooler (I think).

Mine does not have an oil cooler - 1977, family owned since new.


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'49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '63 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '84 8030, '85 6080


Posted By: DrAllis
Date Posted: 23 Apr 2017 at 9:36am
And I think it was standard in 1971, but later made an option on the 175 tractor as a cost reducing change.



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